MZK 40V 16-Inch Cordless Push Mower Review: Runtime, Height and Kit

As an Amazon Associate we earn from qualifying purchases. Details

If you are considering the MZK 40V 16-inch cordless push mower, the first questions are whether a 16-inch cut suits your lawn, how long the batteries last, and whether the kit has what you need to start. This review covers only what the listing states about cutting width, height settings, batteries, runtime, bag, charger and safety start. It does not report any test of the mower on grass, and it does not confirm the runtime, which the listing presents as the maker’s figure. Use the listing to decide whether the mower suits a small to medium yard.

Quick answer

The MZK is a red, battery-powered push mower with a 16-inch cutting width and a brushless motor the bullets rate at up to 3,400 RPM. It runs on two 20-volt, 4.0 amp-hour batteries, which the title calls a 40-volt mower. The bullets say it runs up to 45 minutes on a full charge, and that runtime varies with grass and terrain. The kit includes both batteries, a dual-port charger and an 11-gallon grass bag. The listing gives different cutting height ranges in different fields, so check the height on the product page before you set it.

What to check in a cordless push mower

Four details decide whether this mower fits. Each one can rule it in or out.

1. Cutting width and yard size. The specs and bullets give a cutting width of 16 inches. The bullets describe the mower as ideal for small to medium lawns. A 16-inch deck covers less ground per pass than a wider deck, so a larger lawn needs more passes. The listing does not give a lawn area in square feet.

2. Batteries and runtime. The bullets say the mower uses two 20V 4.0Ah lithium batteries and runs up to 45 minutes on a full charge. The specs also give 45 minutes as the battery average life. Both figures are the maker’s claim, and the bullets say runtime varies with grass conditions, terrain and how the mower is run. Swapping batteries is the listing’s route to a longer mow.

3. Height settings. The bullets give five height positions from 1.4 inches to 3 inches. The specs give a minimum of 1 inch and a maximum of 4 inches. The two sets of figures do not match, so rely on neither until you check the product page. The specs give a handle height of 42 inches.

4. Bag and kit contents. The bullets describe a 40-liter rear grass bag, and the kit list describes an 11-gallon grass bag. The bullets say the mower mulches or bags, and the kit includes one dual-port charger and both batteries. The listing does not give a warranty term.

Use these rules to choose:

• Choose this mower if your lawn is small to medium, you want a cordless push mower with two batteries and a charger in the box, and you can accept the maker’s runtime figure as a claim.
• Choose a different mower if you need a runtime you can rely on, because the listing gives only the maker’s figure.
• Choose a different mower if you need a stated height range, because the listing gives two different ones.

For other cordless options, the best small electric lawn mower with bag guide covers bagging, and the best lawn mower battery voltage and amps guide explains battery ratings.

The MZK cordless push mower

The MZK mower is a walk-behind, manual-operation push mower with a battery power source, a 16-inch cut and a red finish. The specs list the material as alloy steel and plastic, and the item dimensions as 27.94 inches deep, 18.11 inches wide and 12.99 inches high. The item highlight calls it a brushless mower with five height positions and dual batteries for walk-behind mowing. The bullets describe 2-in-1 mowing, with mulching or rear bagging.

The mower fits a reader with a small or medium lawn who wants a cordless push mower without gas or pull-starts, and who will use the two batteries in turn. The bullets describe a two-step safety start to help prevent accidental start-up, which the listing describes but does not test here.

The listing has several things to check. The title says 40V, and the batteries are described as two 20V packs, so the system voltage is the total of the two packs. The height figures differ across fields, as noted above. The bullets give the bag in liters in one place and in gallons in another, so check the bag size on the product page. The listing does not give a weight.

Who should skip it: a reader with a large lawn, a reader who needs a stated runtime, and a reader who needs a stated height range before buying.

Safety around the blade

The U.S. federal standard 16 CFR Part 1205 prescribes safety requirements for certain walk-behind power lawn mowers, and its stated purpose is to reduce the risk of injury from contact with the rotating blade, mainly to the foot and hand. The listing does not state that this mower meets that standard. Keep hands and feet away from the blade, and disconnect the battery before any blade work, as the battery safety guidance says. Store and charge the batteries as the manual describes.

Worked example: how a 30-minute mow sits below the 45-minute claim

Compare that mow with the maker’s 45-minute runtime figure in the bullets, so you can see how much runtime is left.

• Maker’s runtime claim: 45 minutes, from the bullets.
• Mow in this example: 30 minutes.
• Runtime left after the mow: 45 minus 30 = 15 minutes.

Check the arithmetic again. 45 minus 30 is 15. The example shows that a 30-minute mow leaves 15 minutes under the maker’s figure. Grass height, wet grass and terrain shorten real runtime, so keep a spare battery for a larger job.

What brushless means

The title and bullets describe a brushless motor, and the listing gives up to 3,400 RPM. The Wikipedia overview of brushless DC motors says a brushless motor uses an electronic controller to switch the current in its windings, instead of the mechanical brushes of a conventional motor. The controller adjusts the timing and size of the current pulses to set the speed and torque.

For a mower, speed and torque depend on the controller as well as the motor. The listing does not give a torque figure, so judge the job from the cutting width and the height settings rather than the motor claim alone.

Five common mistakes

1. Treating the runtime as a promise. The bullets give 45 minutes as the maker’s figure and say runtime varies.
2. Trusting one height range. The bullets give 1.4 to 3 inches, and the specs give 1 to 4 inches.
3. Mixing up the voltage. The title says 40V, and each battery is 20V.
4. Assuming a bag size. The bullets give 40 liters and an 11-gallon bag in different places.
5. Working on the blade with the battery in. Disconnect the battery before any blade work.

FAQ

How long does a charge last?

The bullets say up to 45 minutes on a full charge, and that runtime varies with grass, terrain and use.

How wide is the cut?

The specs and bullets give 16 inches.

What batteries come with it?

The kit includes two 20V 4.0Ah batteries and a dual-port charger.

How many height settings are there?

The bullets give five settings from 1.4 inches to 3 inches. The specs give a range of 1 inch to 4 inches, so check the product page.

Does it bag or mulch?

The bullets say it can mulch or bag, and the kit includes a grass bag.

Does it come with a warranty?

Bottom line

The MZK 40V 16-inch cordless push mower suits a reader with a small or medium lawn who wants a brushless push mower with two batteries, a dual-port charger and a bag in the box. The listing gives a 16-inch cut, a 45-minute runtime claim and five height positions, but the height ranges differ across fields and the runtime is the maker’s figure. Check the height on the product page, keep a spare battery for a larger lawn, and disconnect the battery before any blade work.

Sources

• 16 CFR Part 1205, Cornell Law School: the walk-behind power lawn mower standard aims to reduce injury from contact with the rotating blade, mainly of the foot and hand.
• Brushless DC electric motor, Wikipedia: an electronic controller switches the current in the windings, replacing mechanical brushes; the controller sets speed and torque.